"boot: initramfs unpacking failed: decoding failed"
mkinitcpio is switching to zstd compressed images.
Check mkinitcpio.conf COMPRESSION to make sure you're running one of the supported compressors.
The next issue is rocm, itself, because it doesn't support kernel 5.11. Only 5.4 and 5.6 are supported at the moment:
Ubuntu 20.04.1 (5.4 and 5.6-oem) and 18.04.5 (Kernel 5.4)
https://rocmdocs.amd.com/en/latest/Insta...Guide.html
And even if rocm will support kernel 5.11, the 6800 is remaing still unsupported.
There is an issue report here, as of 19 Dec 2020(!):
https://github.com/RadeonOpenCompute/ROCm/issues/1344
and here, as of 14 Mar 2021:
https://github.com/RadeonOpenCompute/ROCm/issues/1406
Conclusion:
- your card require latest kernel / driver
- rocm doesn't support latest kernel
- rocm doesn't support RDNA/RDNA2
I recommend that you report/confirm the issue on their git repository, too.
The more issue reports, the sooner you'll get a fix.
And keep your head up, I'm sure, AMD will support the 6800, soon.
mkinitcpio is switching to zstd compressed images.
Check mkinitcpio.conf COMPRESSION to make sure you're running one of the supported compressors.
The next issue is rocm, itself, because it doesn't support kernel 5.11. Only 5.4 and 5.6 are supported at the moment:
Ubuntu 20.04.1 (5.4 and 5.6-oem) and 18.04.5 (Kernel 5.4)
https://rocmdocs.amd.com/en/latest/Insta...Guide.html
And even if rocm will support kernel 5.11, the 6800 is remaing still unsupported.
There is an issue report here, as of 19 Dec 2020(!):
https://github.com/RadeonOpenCompute/ROCm/issues/1344
and here, as of 14 Mar 2021:
https://github.com/RadeonOpenCompute/ROCm/issues/1406
Conclusion:
- your card require latest kernel / driver
- rocm doesn't support latest kernel
- rocm doesn't support RDNA/RDNA2
I recommend that you report/confirm the issue on their git repository, too.
The more issue reports, the sooner you'll get a fix.
And keep your head up, I'm sure, AMD will support the 6800, soon.